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Re: [gpsd-users] Ideas for Kenwood D700 Radio Support

From: Alexander Carver
Subject: Re: [gpsd-users] Ideas for Kenwood D700 Radio Support
Date: Tue, 25 Jun 2013 19:04:40 -0700
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130509 Thunderbird/17.0.6

Note, the D700 (of which I own two) does NOT poll a GPS receiver at all. It simply listens for the common NMEA sentences that contain latitude, longitude, altitude, speed and time (GPRMC and GPGLL at minimum), parses them into internal buffers and then assembles the APRS packet to send. The only transmissions a D700 is capable of making is a waypoint upload (GPWPL) which would plot a waypoint on a receiver. This feature can be turned off and the D700 needs only a receive wire from the GPS to function normally.

On 6/25/2013 18:24, IT1 Stuart Blake Tener, USNR wrote:

Well, the problem is that as far as I know (I disclaim this belief is
not substantiated by any documentation, even though I did find the

Now that I have located and downloaded the manuals, I have only to read
them. Here is a link to the site which is inclusive of the APRS manual too.

If gpsd can just send the NMEA data out a serial port in the absence of
it being in response to a request for a specific type of string, then,
yes, your idea would work with perfection!

V/R and 73,

Stuart, N3GWG


IT1 Stuart Blake Tener, USNR, N3GWG (Extra), MROP

Las Vegas, NV / Boulder, CO / Philadelphia, PA / Beverly Hills, CA

(310) 358-0202 Mobile Phone
(215) 338-6005 Google Voice

e-mail: address@hidden

Quoting "Gary E. Miller" <address@hidden>:

Yo Stuart!

On Tue, 25 Jun 2013 20:35:16 -0400
"IT1 Stuart Blake Tener, USNR" <address@hidden> wrote:

I'd like to consider
how hard it might be to get gpsd to accept commands via a serial port
and answer back with the proper NMEA strings it gets from the

No easy, or even somwhat hard, way to get gpsd to respond to NMEA
commands.  OTOH, gpsd can easily convert your Earthmate output to NMEA
and then feed it out a serial port for your radio.  Then just hope
that what gpsd outputs is what the radio needs.  Since gpsd will send
lat/lon every secnd that should be all you need.


Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
    address@hidden  Tel:+1(541)382-8588

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